GKOS President & COO reports 19,340-share sale at $90 in Form 4

Rhea-AI Filing Summary

Glaukos Corp (GKOS) reported an insider stock sale by its President & COO. On 11/18/2025, the executive sold 19,340 shares of Glaukos common stock at a price of $90 per share. After this transaction, the reporting person beneficially owns 92,366 shares, which includes 62,605 restricted stock units that have not yet vested or been delivered. The filing notes that the report is made by a single reporting person and is signed by an attorney-in-fact on the insider’s behalf.

Insider Trade Summary

Net Seller: 19,340 shares ($1,740,600)

Net Sell 1 txn

Insider Gilliam Joseph E

Role PRESIDENT & COO

Sold 19,340 shs ($1.74M)

Type	Security	Shares	Price	Value
Sale	Common Stock	19,340	$90.00	$1.74M

Holdings After Transaction: Common Stock — 92,366 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gilliam Joseph E

(Last) (First) (Middle)

C/O GLAUKOS CORPORATION

ONE GLAUKOS WAY

(Street)

ALISO VIEJO CA 92656

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GLAUKOS Corp [ GKOS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT & COO

3. Date of Earliest Transaction (Month/Day/Year)
11/18/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/18/2025		S		19,340	D	$90	92,366(1)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes 62,605 restricted stock units that have not yet vested or been delivered to the Reporting Person.

	Diana A. Scherer, Attorney-in-Fact	11/20/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Glaukos Corp (GKOS) disclose in this Form 4?

The filing reports that the company’s President & COO sold 19,340 shares of Glaukos common stock in a single transaction on 11/18/2025.

At what price were the Glaukos (GKOS) shares sold in the reported transaction?

The insider sale was reported at a price of $90 per share for the 19,340 shares of Glaukos common stock.

How many Glaukos (GKOS) shares does the insider report owning after the sale?

Following the reported sale, the President & COO beneficially owns 92,366 shares of Glaukos common stock.

How many restricted stock units are included in the Glaukos (GKOS) insider’s holdings?

The beneficial ownership total includes 62,605 restricted stock units that have not yet vested or been delivered to the reporting person.

What is the role of the reporting person in Glaukos Corp (GKOS)?

The reporting person is an officer of Glaukos Corp, serving as its President & COO, and is therefore required to report equity transactions.

Who signed the Glaukos (GKOS) Form 4 for this transaction?

The Form 4 was signed by Diana A. Scherer as Attorney-in-Fact for the reporting person on 11/20/2025.